Quote:
Originally Posted by tobinaka
UMEZAWA also says that he develops Ut Video for post-P4 CPU. He won't write MMX code even if MMX is faster because MMX is doomed -- 64bit Windows couldn't use MMX practically (though he uses MMX at a single part  ) |
Any CPU that supports SSE also supports MMX. And that won't change with future CPU's, unless they want to break compatibility to millions of existing applications.
Also why should MMX
not work under 64-Bit Windows? I never heard anything like that before.
It's not like SSE is intended to replace MMX. They are two distinct sets of instructions. Why limit yourself to SSE, when you have both, MMX and SSE, available?
You would only make your assembly code slower than it could be...